Conversion contingent, yet infallibly foreknown
Thesis XXXIII. Their next question is whether conversion is a contingent and uncertain thing, or whether, in the person converted, it comes about infallibly through a necessity of cause or of outcome. Their answer: 'Being free, conversion is contingent; being known to God in advance, it is not uncertain to him.
Its necessity is not that of the cause, or of the consequent, for the person was able to resist. Its necessity is that of the consequence, or of foreknowledge, and in that way it comes about without fail in anyone God foreknew would be converted.'
Latin
XXXIII. Si quaeratur An conversio contingens & incerta sit, An vero necessitate causae aut eventus infallibiliter sequatur in eo qui convertitur? Respondemus conversionem esse contingentem quia libera est; nec tamen Deo incertam, quia praecognita est; nec sequi necessitate causae, sive consequentis, quia resistere poterat homo, sed necessitate consequentiae, sive ratione praescientiae infallibiliter sequi, in eo quem conversum iri praescivit Deus.